Body Control Module 99 T&C

I have located the part number for mine. 4801062AE . I have found 4801062AC and 4801062AD. Are the differences in the part numbers represent the different options that the body control module controls? My T&C is an early production, MFR date 5/98 with a 3.8 L engine , FWD, factory alarm system and power door locks. Any help to determine the differences would be great. Wreckers say they have one, but when checking part numbers, there is never a match.
Chuck's